Pipe-wrench.



No. 642,709. Patented Feb. 6, I900. 0. 8. M. OTTESON.

PIPE WRENCH.

(Application filed Feb. 3, 1899.)

(No Model.)

L eww THE NORRIS PETERS 60.. PNaTo-uflwq WASHINGTON. D4 5.

UNITED STATES PATENT OFFICE.

OTTO OTTESON AND MARTIN OTTESON, OF MENOMONEE FALLS, WVISOONSIN.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 642,709, dated February6, 1900.

7 Application filed February 3, 1899. Serial No. 704,381. (No model.)

To all whom it may concern:

Be it known that we, Orro OTTESON and MARTIN OTTESON, citizens of theUnited States, and residents of Menomonee Falls, in the county ofWaukesha and State of VViscousin, have invented certain new and usefulImprovements in Pipe-Wrenches; and we do hereby declare that thefollowing is a full, clear, and exact description thereof.

Our invention has for its object to provide simple economicalpipe-wrenches having the advantages hereinafter set forth; and saidinvention consists in certain peculiarities of construction andcombination of parts specified with reference to the accompanyingdrawings and subsequently claimed.

Referring by letter to the drawings, we show the stock or hand-leverportion of our Wrench provided with a partly depending rigid jaw B atits forward end, the working face of this jaw being transverselyserrated. The jaw B extends laterally from both sides of stock A andprojects a certain distance be low the same.

Loose on the stock A is a slide 0, having a depending lug I), providedwith a tapped aperture engaged by a screw D, the head 0 of which turnsin an under side notch d of said stock and has a forwardly-extendingcenter stud e rotative in a corresponding rear recess in the jaw Baforesaid. The slide is provided with a pair of upwardly-extending earsf, and in pivotal connection with these ears is the shank g of themovable jaw E of the wrench, the working face of the latter jaw beingtransversely serrated. to bite in an opposite direction from theopposing stationary jaw. A bolt h is the preferred pivot for thejaw-shank g, and this being the case a nut 71 is employed in connectionwith the bolt. As herein shown, the rear end of jaw-shank g is madenarrower than the remainder of said shank in order that the latter mayhave a greater range of movement than would be otherwise the caseagainst a spiral spring F under tension between said rear end of theaforesaid shank and the slide 0, above speci- The screw D is operated toadjust the slide 0 on jaw A, and thereby the distance between the fixedjaw B and movable jaw E is regulated. The wrench being set for a certainsize of pipe, it may be used to operate upon a coupling or a next largersize of pipe without resetting, owing to the fact that the distancebetween jaws increases as the movable one is swung outward, this beingone of the advantages of said wrench. It is also to be observed that asthe movable jaw has a greater range of movement than is usual inpipewrenches there is no liability of slip, because the grip of the jawstightens in proportion to the power exerted on the stock.

The movable jaw being readily detachable from the stock, the wrench maybe easily repaired in case said movable jaw is broken,

and it is possible to provide a set of movable jaws with one stock.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is- Y The combination of the stock having afor ward under side notch and a partly-depending rigid jaw adjacent tothe notch provided with a rear recess, a slide on the stock providedwith a pair of upper ears and a lower lug having a tapped aperture, ascrew engaging the lug-aperture, a head on the screw engaging thestock-notch, a center stud on the screw-head engaging the jaw-recess,another jaw having a shank in pivotal connection with the slide-ears,the rear end of this shank being narrowed back of said ears, and aspiral spring under tension between said slide and narrow end of saidshank.

In testimony that we claim the foregoing we have hereunto set our hands,at Menomonee Falls, in the county of Waukesha and'State of Wisconsin, inthe presence of two witnesses.

OTTO OTTESON. MARTIN OTTESON.

Witnesses GEO. GERRERT, ELMER Nuns.

